Machine for cutting a moving web into strips



3 Sheets-Sheet mfenr W. E. MOLINS Filed Sept. 8, 192'? MACHNEA FOR CUTTING A MOVING WEB INTO STRIPS Dec. 3, 1929.

Dec. 3, 1929. w. E. MoLlNs MACHINE FOR CUTTING A lMOVING WEB INTO STRIPS Filed Sept. 8. 1927 3 Sheets-Sheet 2 Dec. 3, 1929. w. E. MoLlNs MACHINE FOR CUTTING A MOVING WEB INTO STRIPS Filed Sept. 8, 1927 3 Sheets-Sheet 3 *l tented Dec. 3, 1929 UNITED STATES WALTER EVERETT MOLINS, OF DEPTFORD, LONDON, ENGLAND MACHINE FOR CUTTING A MOVING WEB INTO STRIPS Application led September 8, 1927, Serial No. 218,347, and in Great Britain September 9, 1926.

rllhis invention is for improvements in or `relating to mechanism for automatically cutting a moving web of paper or like material into strips, and has for its object the pro- M vision of means whereby the leading edge ot the traveling web may be moved out of en-v blade at the point Where the same meets the lixed blade, and it is an object of the present invention to provide means which will en au sure that the leading edge of the web of inaterial is prevented from following the rotatable blade after a strip has been-severed therefrom.

rllhe present invention consists of a device tor severing a travelling web of paper or lilre material into lengths which comprises a lined blade., a rotatable blade adapted to co-operate therewith to eii'ect a shearing action, and a stripper adapted to follow in close proximity to the .rotatable blade, after each shearing operation and traverse a path substantially tangential to the path of the rotatable blade at the point where the same engages with the hxed blade. 1f' Further, the present invention consists ot a device for severing a travelling web of paper or lilre material into lengths which comprises a hxed blade, a rotatable blade adapted to co-operate therewith to effect a shearing action and a toothed stripper adapted to follow in close proximity to the rotatable blade and operable in such a manner that the :tree ends ot the teeth oit' the stripper are automatically moved beyond the peripheral path ot the rotary blade after the same has sheared over the edge of the fixed blade and pass between teeth formed at the free end oit a guide adapted to receive the leading edge ot the web. i

ylhe invention is'more particularly detitl scribed with reference to the accompanying drawings, wherein l Fig. 1 is a sectional side elevation of the device. constructed according to the present invention.

Fig. 2 is a plan View of Fig. 1.

Fig. 3 is a front elevation o Fig. l.

Fig. 4 is a detailed plan view of the rotary cutter illustrated in Fig. l.

Fig. 5 is a side elevation of a modification of the device illustrated in Fig. l.

Fig. 6 is a detailed view of the rotary cutter and guide illustrated in Fig. l and Fig. 7 is a section on the line rtf-a of Fig. l.

One embodiment of the present inventionv as illustrated in the drawings illustrates the invention applied to a machine adapted to envelop an article or a batch of articles in a .U shaped block ended container formed from a strip of paper. The paper is continuously fed by a pair of rollers l and 2 from a reel downwardly through the bed 3 of the ma- 'chine along which the article or batch of articles are ted in rapid succession.V The article or batch ot articles are arranged to engage with the web ot material 4 and a cutting mechanism mounted between the reel ot paper and the bed ot the machine, is so timed as to sever a'strip from the web when the article or batch of articles meets the web. Such a mechanism is described in U. S. Patent No. 1,468,246. The cutting mechanism may comprise a fixed blade and a rotatable blade` and it is found with such cutting mechanism that the leading edge ot the web ot material is liable to adhere to the rotary blade and be deected away from. a guide 5 adapted to direct the leading edge ont the web through the slot 6 in the bed ot the machine.

According to the present invention a stripper is operatively connected to the rotary blade and adapted to follow the path thereof, and move relatively thereto so as to cause'the leading edge ot the web to move out oi engagement with the Vrotary blade and be ted into a substantially vert-ical guide which directs the web through the slot termed in the bed of the machine.

Referring to Figs. l, 2, 3, and 4, a cutting mechanism is mounted in a housing 2" supported upon pillars (not shown) mounted in any desired manner upon the bed 3 of the wrapping machine.

The travelling web of paper 4 is fed to the cutting mechanism from a reel-by the pair of rollers 1 and 2'. The roller 1 is carried upon a frame 8 which is adapted to swing in a horizontal plane about a pivot pin ,9 so as to enable the roller 1 to moveinto and out of engagement with the roller-2, so as to permit the web to be adjusted correctly in the device.

AAfter the web has been correctly aligned, the` roller 1 is moved into position so as to clamp the web against the roller 2. rlhe roller 2 is preferably carried in bearings adapted to yield under the pressure of the roller 1..

' The roller 1 is driven through a pinion from the main drive of the wrapping machine in such a manner that the web is fed to the cutting mechanism at the desired speed.

Mounted below the rollers 1 and 2 are a pair of guide members 10 and 11, which are adapted to feed the web in a vertical path to the cutting mechanism. The guide members 10 and 11 are constructed with vertical ribs 12 and 13, Fig. 7 arranged to give a transverse scallop to the paper in order to increase the vertical rigidity thereof. Situated di.

rectly below the said guide members 10 and 11 is a fixed blade 14 secured to the housing of the cutting mechanism so as to be adjustable towards and away from the web of paper.

Adapted to co-operate with the fixed blade 14 is a rotary blade 15 which is carried upon a spindle 16 in such a manner that the cutting edge thereof engages with the cuttingedge of the fixed blade so as to effect a shearing action.

Mounted upon the said guide member 11 is a resilient deflector plate 17 which is mounted so as to extend towards the edge of the fixed blade in such a'manner that its leading edge is located in close proximity thereto, and in the path of the edge of the rotary blade. The plane of the defiector plate 17 is inclined to the plane of the fixed blade and is located on that side thereof from which the rotatable blade approaches the fixed blade. The deflector plate 17 is controlled so that its movement towards the rotary blade may be limited to a predetermined distance.

The resilient deflector plate 17 hereinbefore described is preferably provided at its leading edge with a series of Vtongues 18, the purpose of which are described in S. Patent No. 1,631,87 9. The rotary blade is adapted to move in an anti-clockwise direction and is provided in advance of its cutting edge with a guard 19. which as the rotary blade 15 api proaches the fixed blade 14 initially moves the web of paper and the deflector plate towards the edge of the fixed blade. whereuponthe moving blade engages with the web and 'moves it'together with the deflector plate 17 towards the fixed blade so as to move the Ytary blade 15. The stripper rod 20 is -moved by the rotary blade it almost makes a scraping contact with the surface of the xed blade.

As the rotary blade 15 moves over the edge of the fixed blade, the tongues 18 of the deflector plate 17 move towards the axis of the rotary lade and deflect the freshly cut edge of the web away from the edge of the fixed blade.

In order to prevent the leading ed e of the web from adhering to the surface o the rotary blade, there is mounted to the rear of the cutting edge of the rotary blade, a hinged stripper rod 20 pivoted at 2,1, and provided with two fingers 22, the free ends of which lie substantially flush with the edge of the rorovided at its free end with a roller 23 adarlitcd to ride over the surface of a fixed cam 24 as the rotary blade 15 rotates. After the rotary blade has severed a strip from the travelling web of material, the hinged stripper rod 20 engages with a portion of the cam 24 and moves the fingers 22 so as to extend beyond the peripheral path of the rotary blade 15 and move the leading edge of the web out of engagement with the rotary blade. The continued movement of the stripper rod 20 is arranged so that the free ends of the fingers 22 move in a substantially vertical plane tangential to the rotary blade when the same engages with the fixed blade and hold the leading edge of the web in a substantially vertical plane and ensure that the same is fed into a vertical Guide 5 located directly above the slot 6 vformed in the bed of the machine.

The upper edge of the' vertical guide 5 which receives the leading edge of the web is located substantially upon the cylindrical surface traced by the rotary blade. As the free ends `of the fingers 22 trace a path which extends beyond the peripheral path of the blade the upper edge of the vertical guide 5 is provided with corresponding teeth which permit the free end of the fingers 22 to pass through the plane of xthe vertical guide.v

'The stripper rod 20 is spring controlled and is arranged to return to its initial position after the cam hereinbefore referred to has moved the fingers 22 into their extreme position.

Instead of the fingers. 22 hereinbefore referre'd to, the' stripper for removing the l'eading edge of `the web outof engagement with the rotary blade ,and directing the same into the vertical'guide may comprise the arrange- -ment as illustrated in Figs. 5 and 6, wherein present invention positive means are`provided whereby the leading edge of the web liti is moved out-of engagement with the edge of the lrotary blade and is fed vertically through a guide which directs it through a slot in the bed of the machine without the possibility of the same Vfoulingthe edge ofthe slot or guide.

What I claim as my invention and desire to 4 secure by Letters Patent is zl. In apparatus of the class described, the combination with a rotatable element adapted to engage a travelling web of sheet material, of a guide for said web located adjacent the -point of, engagement between said web and said element, and means movable substantially in a straight line and tangentially of the said element to said guide.

rotatable element to convey said web from 2. Inapparatus of the class described, the combination with a rotatable element adapted to engage a travelling web of sheet material, of a fixed guide for said web located 4adjacent the point of engagement between said web and saidelement, and means rotatable with j said element to guide said web from said elecomprises a fixed blade, a' rotatable/blade arranged tol cooperate therewith to` e'ect a mentto said iixed guide, said means being 'movable in substantially a straight line tangential to the path ofmovement ofA said element.

3. A device for severing a travelling` webv l of paper or like materialinto lengths which shearing action and a stripper associated with the rotatable blade and operable to engage the i leading edge of the web of material and strip i Y the same from the rotatable blade after each shearing operation, said stripper moving substantially in a straight line tangentially of the rottable bladeduring engagement with the we 4; device for severing of paper or like material into lengths which comprises a xed blade', a rotatable blade arranged vto cooperate therewith tov effect av l shearing action and a stripper operable auto matically to follow in close proximity to the rotatable blade after each shearing operation,

and to move in substantially a straight line path tangential to the path of the rotatable page Where the same engages with the fixed Intestimony whereof I-hereunto aliix signature.

' WALTER EvERETTMQLINs.

a travelling vweb 

